Blog Tags: Co2
It comes as no surprise that Arctic sea ice melt has a range of ecological and economic consequences, from hastening sea level rise to disrupting food chains. Polar bears, for instance, are having to change their diets from seals, their preferred prey source, to other options like snow geese, while ice melt is unlocking trillions of frozen microplastics into the marine environment.
For the first time in human history, atmospheric carbon dioxide levels passed 400 parts per million (ppm) of carbon dioxide at the historic Mauna Loa Observatory in Hawaii. This is the same location where Scripps Institution of Oceanography researcher Charles David Keeling first established the “Keeling Curve,” a famous graph showing that atmospheric carbon dioxide concentrations are increasing rapidly in the atmosphere. CO2 was around 280 ppm before the Industrial Revolution, when humans first began releasing large amounts of CO2 to the atmosphere by burning fossil fuels. On May 9, the reading was a startling 400.08 ppm for a 24-hour period. But without the help of the oceans, this number would already be much higher.
It makes sense that ocean acidification is bad for marine life. But who knew it could have far-reaching effects on human health as well?
A new report by scientists at Woods Hole Oceanographic Institution (WHOI) shows that ocean acidification is threatening global food security by hindering the growth of clam, oyster, and other mollusk populations – staples in many nations’ diets.
Without healthy and reliable mollusk populations, countries may be forced to switch to aquaculture. Countries like Haiti, Senegal, and Madagascar, however, lack the ability to make this switch and are thus especially vulnerable to the impacts of mollusk shortages. And of course, problems like this never exist in a vacuum; even developed countries such as the U.S. will feel the effects via a potential drop in GDP.
Unfortunately, this isn’t just a theoretical problem – the deleterious effects can already be seen in both ecosystems and economic realms alike. In Australia’s Great Barrier Reef, scientists have observed that coral growth has slowed, and Pacific Northwest oyster farms have already experienced declining economic yields. Further effects, which will no doubt be broader in scope, will probably be seen in 10 to 50 years if we do not make a concerted effort to halt ocean acidification.
- Ocean Roundup: Fiddler Crabs Found Far North of Their Range, 500 Dead Sea Lions Discovered in Peru, and More Posted Tue, November 25, 2014
- Sea Turtles Can Get the Bends after Capture in Fishing Gear, Says New Study Posted Tue, November 25, 2014
- Ocean Roundup: Dolphins Use Whistles as Names, Conservationists Call for Removal of Queensland Shark Nets, and More Posted Mon, November 24, 2014
- ICCAT Moves to Properly Manage Bluefin Tuna, but Doesn’t Take Action for Sharks and Swordfish Posted Wed, November 26, 2014
- Oceana in Chile Submits Recommendations for Lowering Common Hake Catch Quotas Posted Mon, November 24, 2014